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The Gilded Skin

Beginner's Guide · Skincare Essentials

PDRN Skincare Explained: What 'Salmon DNA' Serums Can and Can't Do

PDRN — often called salmon DNA — is one of 2026's buzziest ingredients. Here's what it is, why most evidence comes from injections rather than serums, and what to know before buying.

By Elise Marlowe

Published 3 min read

Glass pipette releasing a clear lilac gel onto a white surface
Image: Fernando Serrano / Pexels

The quick answer

PDRN (polydeoxyribonucleotide) is a mixture of DNA fragments, usually from salmon, studied for tissue repair. Most of the encouraging research involves injected or in-clinic treatments; evidence for everyday topical serums is limited, and a recent scoping review concluded safety and efficacy aren't yet well supported. If you try a PDRN serum, treat it as an experiment, not a proven treatment.

Key takeaways

  • PDRN is a DNA-fragment ingredient, typically sourced from salmon.
  • The stronger research involves injections and procedures, not over-the-counter serums.
  • A scoping review found nucleotide 'skin boosters' are not yet well supported by data.
  • Judge topical products by the full formula and your own tolerance, not by the trend.

PDRN has gone from Korean clinics to everyday serums, usually marketed as "salmon DNA." The science behind it is real — but most of it doesn't come from the kind of product you can buy off a shelf.

What PDRN is

PDRN stands for polydeoxyribonucleotide, a mixture of DNA fragments most often extracted from salmon. Researchers describe it as acting on adenosine A2A receptors, which are involved in tissue repair, according to a narrative review.

Where the evidence comes from

This is the key point for shoppers. Much of the encouraging data on PDRN comes from injected treatments, procedures and laboratory or animal studies — not from people applying a serum at home. A recent scoping review of nucleotide-based skin boosters concluded that their safety and efficacy are not yet well supported by the available data, despite growing use.

PDRN: injected vs. topical
UseWho does itEvidence
Injected 'skin booster'Licensed cliniciansMost of the published research, but still limited
In-clinic procedures (e.g., after microneedling)Licensed cliniciansSome studies; often combined with other treatments
Topical serums and creamsYou, at homeLittle direct human evidence

Should you try a PDRN serum?

If a PDRN product appeals to you, it's reasonable to try — as long as you see it as an experiment. Any comfort or glow you notice may come from the rest of the formula, such as humectants and soothing ingredients.

Five questions before buying PDRN skincare

  • Is the research the brand cites on injections, or on topical use?
  • What else is in the formula — and is that doing most of the work?
  • Is it fragrance-free if your skin is sensitive?
  • Is it salmon-derived, or a plant-based alternative (if that matters to you)?
  • Does it fit into your routine without replacing proven basics like sunscreen?

For ingredients with stronger topical evidence, see our guides to azelaic acid and retinol with vitamin C.

Comparing trending ingredients? Azelaic acid has stronger topical evidence, while hypochlorous acid is a gentle supporting step with a long medical history.

The bottom line

PDRN is a genuinely interesting ingredient, but the hype has run ahead of the evidence for at-home serums. Enjoy one if you like it, keep your expectations modest, and don't let it replace the routine basics that are proven: gentle cleansing, moisturizer and daily sunscreen.

Frequently asked questions

Does topical PDRN work?

There isn't strong evidence yet. Most published research is on injected or procedural use. A topical serum may still be pleasant to use, but its specific benefits from PDRN are unproven.

Is PDRN the same as an exosome or growth factor serum?

No. They are different ingredient types that are often grouped together as 'regenerative' skincare. Each has its own, generally limited, evidence for topical use.

Is PDRN vegan?

Most PDRN is derived from salmon, so it isn't vegan. Some brands now offer plant-derived alternatives — check the ingredient list and brand information.

How this guide was researched

This guide is based on independent research of the sources listed below. We did not conduct hands-on testing of products for this article. Content is general information, not medical advice; talk to a dermatologist or other qualified clinician about specific skin concerns. Read our editorial policy.

Sources

Factual claims in this guide are based on the following references. Links open the original source.

  1. Nucleotide-based skin boosters in aesthetic dermatology: a scoping review of their potential role — JEADV Clinical Practice / Wiley (DOI 10.1002/der2.70080)Supports: Safety and efficacy of nucleotide skin boosters not well supported by available data.
  2. PDRN in dermatology — narrative review — Journal of Skin and Stem Cell (Brieflands)Supports: Mechanism via adenosine A2A receptors; much of the data from injected and animal studies.

Written by

Elise Marlowe

Editor, The Gilded Skin

Elise Marlowe is the editor of The Gilded Skin. She researches beauty tools, skincare routines and vanity organization, reads the dermatology and regulatory sources behind each guide, and writes about what is worth buying and who should skip it. She is not a dermatologist, and her guides say clearly when they are based on research rather than hands-on testing.

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